CN110977065B - Blisk electrolytic forming rotary opening tool and electrolytic forming method - Google Patents
Blisk electrolytic forming rotary opening tool and electrolytic forming method Download PDFInfo
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- CN110977065B CN110977065B CN201911052748.5A CN201911052748A CN110977065B CN 110977065 B CN110977065 B CN 110977065B CN 201911052748 A CN201911052748 A CN 201911052748A CN 110977065 B CN110977065 B CN 110977065B
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- blisk
- machine tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/10—Working turbine blades or nozzles
Abstract
A blisk electrolytic forming rotary opening tool and an electrolytic forming method comprise a sleeve component sleeve cover plate, an electrolyte water inlet pipe, an electrolyte water gap, an electric connection screw rod, a cutter pin, an electrode plate, a shaft holder, a rotary connecting piece and a curved sliding track; an electrolytic blisk forming method comprising the steps of: step 1, mounting a rotary opening tool on an opening shaft of a machine tool and a left cavity of the machine tool; step 2, determining the initial processing original points of the machine tool open shaft and the horizontal electrolysis machine tool workbench X, Y, Z shaft; step 3, inputting machining parameters through a control panel of the horizontal electrolytic machine tool; step 4, processing a single blade in the blisk; and 5, after the single blade of the blisk is opened, adjusting the angular position of the blisk through the blisk indexing tool, and machining the next blade until the machining is finished. The tool is used for rotationally shaping and processing the variable-camber blade of the blisk, and the processed blade has uniform allowance and high precision.
Description
Technical Field
The invention belongs to the technical field of electrolytic machining, and particularly relates to a blisk electrolytic forming rotary opening tool and an electrolytic forming method.
Background
The motor processing is a process for etching and removing materials by utilizing an electrochemical anode dissolution principle and finally processing and molding parts. The technology is not limited by the mechanics and mechanical properties of the workpiece material, the surface processing quality of the part is high, no stress and no heat influence area exist, and the tool cathode is not damaged. With the development of science and technology and industrial technology, new requirements are put forward on the form and the scale of parts, and products are developed towards precision and miniaturization. Compared with a non-integral type blade disc, the novel aero-engine gas compressor integral blade disc has the advantages of small weight, high stability and the like, and has wide application prospect in the field of the front edge of an aero-engine.
At present, the commonly used machining method of the blisk blade comprises the following steps: numerical control milling, linear friction welding, precision electrolytic machining and the like, wherein the precision electrolytic machining technology is suitable for machining the blisk of the high-pressure compressor. However, the precision electrolytic machining process has the problem of high dependence on equipment, and the cost of a single precision electrolytic machining device for machining the blisk blade is higher than that of a numerical control milling machine tool.
The electrolytic machining of the blisk blade is divided into rough grooving machining and precise forming. The traditional electrolysis equipment can only carry out straight grooving machining due to the fact that a feed shaft is not rotated, the machined blade is low in precision, and allowance distribution is uneven. This requires a movement and rotation linkage during the electrode feed in the rough grooving stage in order to leave a uniform margin for precision forming. This increases the requirements on the electrolytic machine, occupies the capacity of the precision electrolytic equipment, and increases the cost of rough grooving.
Disclosure of Invention
The invention aims to improve the conditions that the existing blisk electrolytic rough grooving utilizes advanced precise electrolytic equipment, occupies equipment capacity, and has high research and development and production costs, and the like, and provides a blisk electrolytic forming rotary opening tool and an electrolytic forming method, which reduce research and development and production costs, shorten the research and development period of blisk blade electrolytic machining, and realize a blisk electrolytic machining method with matched countershaft rotation angle and feeding by utilizing the rotary opening tool.
A blisk electrolytic forming rotary shaping tool comprises a sleeve assembly, one end of the sleeve assembly is connected with a cavity on the left side of a machine tool, a machine tool shaping shaft is coaxially sleeved in the cavity on the left side of the machine tool and extends to an inner cavity of the sleeve assembly, a shaft holder is coaxially installed in the inner cavity of the sleeve assembly, one end of the shaft holder is matched with an inner hole of the machine tool shaping shaft, a curved sliding track symmetrically arranged relative to the axis is arranged at the other end of the shaft holder, a central flow passage I is formed along the axis of the shaft holder, an electrolyte inlet pipe is arranged on the shaft holder and is communicated with one end of a small-diameter hole of the central flow passage I, the electrolyte inlet pipe is arranged close to the machine tool shaping shaft, a rotary connecting piece is coaxially sleeved in the central flow passage I of the shaft holder, one end of the rotary connecting piece is matched with the other end of the small-diameter hole of the central flow passage I, the other end of the rotary connecting piece is matched with the sleeve assembly, sliders are symmetrically arranged on the outer circular surface of the middle portion of the rotary connecting piece and matched with the curve-shaped sliding track, one end, far away from a machine tool shaping shaft, of the rotary connecting piece in the central flow channel II is connected with one end of an electrolyte water gap, the other end of the electrolyte water gap is provided with an electrode plate, electric connection screws are symmetrically arranged on the electrode plate, a cutter pin is arranged on each electric connection screw, a sleeve cover plate is sleeved on each electrolyte water gap, and the sleeve cover plate is connected with the sleeve assembly.
The sleeve component comprises an upper barrel body and a lower barrel body, and the upper barrel body and the lower barrel body are butted to form the sleeve component.
The sleeve cover plate is made of a polyether-ether-ketone material, the electrolyte water gap is made of a polyimide material, the shaft holder, the rotary connecting piece, the left sleeve, the right sleeve and the counter knife pin are all made of stainless steel materials, and the electric connection screw rod is made of a red copper material.
An integral blade disc electrolytic forming method adopts an integral blade disc electrolytic forming rotary opening tool and comprises the following steps:
step 2, mounting the blisk blank on a horizontal electrolytic machine tool workbench, and using a cutter pin and the blisk blank to perform tool setting to determine an initial processing origin of a machine tool open shaft and a horizontal electrolytic machine tool workbench X, Y, Z shaft;
and 5, after the single blade of the blisk is opened, adjusting the angular position of the blisk through the blisk indexing tool, and processing the next blade until the processing of the whole blisk blade is completed.
The invention has the beneficial effects that:
1. the invention provides the electrolytic rotary open-shaped machining method of the blisk blade by combining the advantages of high electrolytic machining efficiency and no cutter loss; the curve slide rail between the shaft holder and the rotary connecting piece is matched to realize the rotary opening processing of the variable-curve-surface blade of the blisk, the processed blade has even allowance and high precision, the equipment cost and the processing and research and development requirements of the blisk are reduced, the research and development period is shortened, and the huge potential benefits are realized.
2. The method is applied to the field of the electrolytic forming processing of the blades of the blisk of the aero-engine, and is suitable for high-precision low-cost processing of the complex twisted blades of the blisk. The invention utilizes the characteristic of high cost of the electrolysis process to be matched with the rotary opening tool to realize the electrolytic forming of the variable-curve blade of the blisk by the equipment without the rotating shaft, effectively reduces the research and development cost and the processing cost, has the characteristics of high precision electrolytic processing efficiency and low production cost, and has wide application prospect.
3. The method solves the problem that the electrolytic forming of the complex curved surface blade of the blisk is highly dependent on equipment, ensures the full-section profiling precision of the blisk blade, reduces the equipment cost for the electrolytic machining of the blisk compared with the traditional electrolytic machining, and improves the research and development efficiency by more than 50%.
Drawings
FIG. 1 is a front view of a rotary die attachment of the present invention;
FIG. 2 is a top view of the rotary open tooling of the present invention;
FIG. 3 is a right side view of the rotary die attachment of the present invention;
FIG. 4 is an enlarged view of a portion of an electrolyte inlet pipe of the rotary open-shaped tooling of the present invention;
FIG. 5 is a cross-sectional view of the rotary open fixture of the present invention taken along the line A-A;
FIG. 6 is a cross-sectional view of the rotary open fixture of the present invention taken along the direction B-B;
FIG. 7 is a C-C cross sectional view of the rotary open tooling of the present invention;
FIG. 8 is a view of the rotary die-cutting tool of the present invention rotated 180 degrees in the D-D direction;
FIG. 9 is a schematic diagram of a curved sliding track of the rotary shaping tool of the present invention;
FIG. 10 is a diagram showing the relationship between the curved sliding track trajectory and the rotation angle of the rotary shaping tool according to the present invention;
FIG. 11 is a top view of a blisk machined by the rotary open-form tooling of the present invention;
FIG. 12 is a front view of a blisk machined by the rotary open-form tooling of the present invention;
1-machine tool open shaft, 2-machine tool left cavity, 3-sleeve component, 4-sleeve cover plate, 5-electrolyte inlet pipe, 6-electrolyte water gap, 7-electric screw, 8-pair cutter pin, 9-electrode plate, 10-shaft holder, 11-rotary connecting piece, 12-curved sliding track, and 13-blisk blank.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 8, a blisk electrolytic forming rotary shaping tool comprises a sleeve component 3, one end of the sleeve component 3 is connected with a cavity 2 on the left side of a machine tool through a pin and a screw, a machine tool shaping shaft 1 is coaxially sleeved in the cavity 2 on the left side of the machine tool, the machine tool shaping shaft 1 extends to an inner cavity of the sleeve component 3, a shaft holder 10 is coaxially installed in the inner cavity of the sleeve component 3, one end of the shaft holder 10 is matched with an inner hole of the machine tool shaping shaft 1, the other end of the shaft holder 10 is provided with curved sliding rails 12 symmetrically arranged relative to an axis, arc tops of the two curved sliding rails 12 face opposite directions, a curved track of the curved sliding rails 12 is determined by the height of each section of a blade and the angle of a chord line, a central flow channel i is arranged along the axis of the shaft holder 10, an electrolyte inlet pipe 5 is arranged on the shaft holder 10, and the electrolyte inlet pipe 5 is communicated with one end of a small-diameter hole of the central flow channel i, an electrolyte inlet pipe 5 is arranged close to a machine tool shaping shaft 1, a rotary connecting piece 11 is coaxially sleeved in a central flow passage I of a shaft holder 10, one end of the rotary connecting piece 11 is matched with the other end of a small-diameter hole of the central flow passage I, the other end of the rotary connecting piece 11 is matched with a sleeve component 3, sliders are symmetrically arranged on the outer circle surface of the middle part of the rotary connecting piece 11 and are matched with a curved sliding track 12, one end, far away from the machine tool shaping shaft 1, in a central flow passage II of the rotary connecting piece 11 is connected with one end of an electrolyte water gap 6, the other end of the electrolyte water gap 6 is provided with an electrode plate 9, the cross section shape of a central flow passage III on the electrode plate 9 is determined according to the outward offset 1mm of the cross section shape of a blade, electric connecting screw rods 7 are symmetrically arranged on the electrode plate 9, a counter knife pin 8 is arranged on the electric connecting screw rods 7, a sleeve cover plate 4 is sleeved on the electrolyte water gap 6, and the sleeve cover plate 4 is connected to the sleeve assembly 3.
The sleeve component 3 comprises an upper barrel body and a lower barrel body, and the upper barrel body and the lower barrel body are butted to form the sleeve component 3.
The sleeve cover plate 4 is made of polyether-ether-ketone materials, the electrolyte water gap 6 is made of polyimide materials, the shaft holder 10, the rotary connecting piece 11, the left sleeve, the right sleeve and the counter knife pin 8 are made of stainless steel materials, and the electric connection screw 7 is made of red copper materials.
An electrolytic forming method of a blisk adopts a blisk electrolytic forming rotary open-shape tool, as shown in fig. 9 to 12, and comprises the following steps:
step 2, mounting the blisk blank 13 on a horizontal electrolytic machine tool workbench, and using a cutter pin 8 to perform tool setting on the blisk blank 13 to determine an initial processing origin of the machine tool slotting shaft 1 and the horizontal electrolytic machine tool workbench X, Y, Z;
and 5, after the single blade of the blisk is opened, adjusting the angular position of the blisk through the blisk indexing tool, and processing the next blade until the processing of the whole blisk blade is completed.
Claims (3)
1. A blisk electrolytic forming rotary shaping tool is characterized by comprising a sleeve assembly, wherein the sleeve assembly comprises an upper barrel and a lower barrel, the upper barrel is in butt joint with the lower barrel to form the sleeve assembly, one end of the sleeve assembly is connected with a left cavity of a machine tool, a machine tool shaping shaft is coaxially sleeved in the left cavity of the machine tool and extends to an inner cavity of the sleeve assembly, a shaft holder is coaxially mounted in the inner cavity of the sleeve assembly, one end of the shaft holder is matched with an inner hole of the machine tool shaping shaft, a curved sliding rail symmetrically arranged relative to the axis is arranged at the other end of the shaft holder, a central flow passage I is formed along the axis of the shaft holder, an electrolyte inlet pipe is arranged on the shaft holder and is communicated with one end of a small-diameter hole of the central flow passage I, the electrolyte inlet pipe is arranged close to the machine tool shaping shaft, a rotary connecting piece is coaxially sleeved in the central flow passage I of the shaft holder, one end of a rotary connecting piece is matched with the other end of the small-diameter hole of the central flow passage I, the other end of the rotary connecting piece is matched with the sleeve component, sliders are symmetrically arranged on the outer circular surface of the middle portion of the rotary connecting piece, the sliders are matched with the curved sliding rails, one end, away from a machine tool shaping shaft, of the rotary connecting piece in the central flow passage II is connected with one end of an electrolyte water gap, the other end of the electrolyte water gap is provided with an electrode plate, the cross section shape of a central flow passage III on the electrode plate is determined according to the outward bias 1mm of the cross section shape of a blade, electric connection screw rods are symmetrically arranged on the electrode plate, a cutter aligning pin is arranged on the electric connection screw rods, a sleeve cover plate is sleeved on the electrolyte water gap, and the sleeve cover plate is connected with the sleeve component.
2. The blisk electrolytic forming rotary opening tool as claimed in claim 1, wherein the opening tool is characterized in that: the sleeve cover plate is made of a polyether-ether-ketone material, the electrolyte water gap is made of a polyimide material, the shaft holder, the rotary connecting piece, the left sleeve, the right sleeve and the counter knife pin are all made of stainless steel materials, and the electric connection screw rod is made of a red copper material.
3. An electrolytic forming method of a blisk, which adopts the electrolytic forming rotary open-shape tool of the blisk according to claim 1, and is characterized by comprising the following steps:
step 1, respectively installing a shaft holder and a sleeve assembly of the blisk electrolytic rotary opening tool on a machine tool opening shaft and a machine tool left cavity;
step 2, mounting the blisk blank on a horizontal electrolytic machine tool workbench, and using a cutter pin and the blisk blank to perform tool setting to determine an initial processing origin of a machine tool open shaft and a horizontal electrolytic machine tool workbench X, Y, Z shaft;
step 3, inputting the machining completion position values of the steps of the machine tool opening shaft and the horizontal electrolysis machine tool workbench X, Y, Z shaft, the feeding speed of the machine tool opening shaft, the linkage feeding speed of the horizontal electrolysis machine tool workbench X, Y, Z shaft, electrical parameters and electrolyte parameters through a control panel of the horizontal electrolysis machine tool;
step 4, opening the electrolyte, wherein in the electrolytic machining process, the electrolyte flows into the central flow channel I of the shaft holder through the electrolyte inlet pipe, then flows into the electrolyte water gap through the central flow channel II of the rotary connecting piece, finally flows out of the central flow channel III of the electrode plate and enters the machining area; meanwhile, a power supply is switched on, the blisk electrolytic forming processing is started, the curved sliding rails symmetrically arranged on the shaft holder based on the central line of the shaping shaft of the machine tool are utilized to drive the rotary connecting piece to rotate during the processing process when the shaping shaft of the machine tool feeds, the electrolyte water gap rotates along with the rotary connecting piece, the accurate rotation of the electrode plate is realized, and the precise processing of the variable-curve blades of the blisk is realized by matching with the linkage of the blisk X, Y, Z shaft while the shaping shaft of the machine tool feeds;
and 5, after the single blade of the blisk is opened, adjusting the angular position of the blisk through the blisk indexing tool, and processing the next blade until the processing of the whole blisk blade is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911052748.5A CN110977065B (en) | 2019-10-31 | 2019-10-31 | Blisk electrolytic forming rotary opening tool and electrolytic forming method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911052748.5A CN110977065B (en) | 2019-10-31 | 2019-10-31 | Blisk electrolytic forming rotary opening tool and electrolytic forming method |
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| CN110977065A CN110977065A (en) | 2020-04-10 |
| CN110977065B true CN110977065B (en) | 2022-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3156808A (en) * | 1956-11-20 | 1964-11-10 | Rolls Royce | Manufacture of turbine and compressor blades |
| JPH03184726A (en) * | 1989-11-03 | 1991-08-12 | Varian Spa | Method for manufacturing impeller or rotor having not less than one vanes for turbine pump application using electrical discharge machining and device manufactured thereby |
| RU2305614C2 (en) * | 2005-09-26 | 2007-09-10 | Общество с ограниченной ответственностью "Поток-ПТЛ" | Method for electrochemical dimensional working of turbine blades and apparatus for performing the same |
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